Should I get Guild Wars Prophecies, Faction or Nightfall?

I am new to this game called Guild Wars and I don't know much about it, but I know that I can choose from three expansions. Now I need help to choose one. I am an experienced player and help me make up my mind between Guild Wars Prophecies, Faction or Nightfall? Should I get Guild Wars Prophecies, Faction or Nightfall?

If you are experienced as you say you are, and then you should take the last one. If you were a newbi I would recommend to go with the first one, because it is the most easy one and you can get to know this game from the very beginning and it will not all seem so terrifying after a while. But if you are as experienced as you say then you will have no problem with trying the last one. It is more rewarding, but it is also much harder to play if you don't know the first two. I hope you will have great time while playing it.